package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.hunanUniversity.model.DB;
import com.hunanUniversity.model.UserBean;

public class MainServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("gb2312");
		response.setContentType("gb2312");
		String username=request.getParameter("username");
		String pwd=request.getParameter("pwd");
		DB db=new DB();
		HttpSession session=request.getSession();
		UserBean user=(UserBean)session.getAttribute("user");
		if(user==null){
			user=db.checkUser(username,pwd);
		}
		session.setAttribute("user",user);
		if(user!=null){
			ArrayList al=new DB().findLyInfo();
			session.setAttribute("al",al);
			response.sendRedirect("main.jsp");
		}else{
			response.sendRedirect("login.jsp");
		}
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doGet(request, response);
	}

	
	

}
